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Thread: Brake bleeding

  1. #16
    23K Original Miles slover's Avatar
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    Re: Brake bleeding

    I don't know if this is the exact model I have from Motive, but it looks like this. https://www.motiveproducts.com/colle...t-bleeder-kits

    It "pushes" fluid through.
    Last edited by slover; 07-11-2017 at 12:20 PM.
    John Lewenauer - Newsletter Editor - Regional Director
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  2. #17
    Registered User ColKlink's Avatar
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    Re: Brake bleeding

    Quote Originally Posted by slover View Post
    I don't know if this is the exact model I have from Motive, but it looks like this. https://www.motiveproducts.com/colle...t-bleeder-kits

    It "pushes" fluid through.

    Your bleeders sound clogged.
    They had the rubber covers, but I suppose some dirt can still get in. I was hesitant to removed them since I'm new at this. I'll give it a shot this evening.

    I'm using a vacumm system as per image, not a 'pusher'.
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    Roland W.

    '59 190SL #14333: DOB June 12, 1959 (Silver)
    '61 190SL # 22385 DOB Sept 1, 1961 (Light Blue)
    Some photos, documents and work-in-progress pics. Updated Jul 10, 2009

  3. #18
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    Re: Brake bleeding

    Roland:
    I use a very similar device (Mighty-Vac) and as memory serves me, you have to pump up the vacuum with the bleeder closed; then open the bleeder quickly while you have a built up vacuum. You may want to put a little grease on the bleeder threads to keep from pulling air in around the bleeder.
    It sounds dumb, but it worked for me.

    Good luck,

    Greg
    Greg Peirce
    Beaufort, SC

  4. #19
    Registered User ColKlink's Avatar
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    Re: Brake bleeding

    Quote Originally Posted by gpeirce View Post
    Roland:
    I use a very similar device (Mighty-Vac) and as memory serves me, you have to pump up the vacuum with the bleeder closed; then open the bleeder quickly while you have a built up vacuum. You may want to put a little grease on the bleeder threads to keep from pulling air in around the bleeder.
    It sounds dumb, but it worked for me.

    Good luck,

    Greg
    Good tip, thanks Greg.
    Roland W.

    '59 190SL #14333: DOB June 12, 1959 (Silver)
    '61 190SL # 22385 DOB Sept 1, 1961 (Light Blue)
    Some photos, documents and work-in-progress pics. Updated Jul 10, 2009

  5. #20
    Registered User AlanJ's Avatar
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    Re: Brake bleeding

    I use the wife's foot on the brake pedal ... very quick to set up, cheap ... and no messing around with pumping up air pressure!

    By the way, please don't put grease anywhere near brake fluid, it contaminates it.
    Alan Jones

  6. #21
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    Re: Brake bleeding

    Alan:

    Good point, I should have said synthetic grease or brake paste.
    Greg Peirce
    Beaufort, SC

  7. #22
    Registered User ColKlink's Avatar
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    Re: Brake bleeding

    I think Teflon tape is likely the best on the threads if used carefully, no?
    Roland W.

    '59 190SL #14333: DOB June 12, 1959 (Silver)
    '61 190SL # 22385 DOB Sept 1, 1961 (Light Blue)
    Some photos, documents and work-in-progress pics. Updated Jul 10, 2009

  8. #23
    Registered User AlanJ's Avatar
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    Re: Brake bleeding

    If you look at the design of the bleed nipple Roland you will see that if it is not seating properly, the fluid will travel up the centre of the nipple regardless of whether the threads are sealed or not.

    I had this problem with an oversized master cylinder bleed nipple that I was using to replace a drilled-out broken original. Eventually I managed to find someone who could accurately re machine the seat which fixed the problem.
    Alan Jones

  9. #24
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    Re: Brake bleeding

    I was referring to the air leak that comes from using a vac pump. When you open the nipple to bleed it, the pump will pull air in past the threads and out through the nipple. This results in tiny bubbles which makes it impossible to tell if you have sufficiently bled the line. If the nipple leaks brake fluid, it is most likely a "seat" problem like Alan describes.
    Greg Peirce
    Beaufort, SC

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